Date: Thu, 20 Sep 2001 17:57:54 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender: eliz AT is
To: Wojciech Galazka <wojciech DOT galazka AT polkomtel DOT com DOT pl>
cc: "'djgpp-workers AT delorie DOT com'" <djgpp-workers AT delorie DOT com>
Subject: Re: gcc-3.01 seems unstable 
In-Reply-To: <250B3114DA16D511B82C00E0094005F8023FC191@MSGWAW11>
Message-ID: <Pine.SUN.3.91.1010920175112.7799B-100000@is>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Reply-To: djgpp-workers AT delorie DOT com
Errors-To: nobody AT delorie DOT com
X-Mailing-List: djgpp-workers AT delorie DOT com
X-Unsubscribes-To: listserv AT delorie DOT com
Precedence: bulk


On Thu, 20 Sep 2001, Wojciech Galazka wrote:

> gcc -D_USE_LIBM_MATH_H -D_HAVE_STDC -fno-builtin -O2 -g -nostdinc
> -Id:/djgpp.2/tests/cygnus -Id:/djgpp.2/tests/cygnus/../../include  -c -o
> test.o test.c
> 
> Exiting due to signal SIGSEGV
> General Protection Fault at eip=00000214
> eax=ffc9de35 ebx=9fff6cc0 ecx=00000004 edx=ffecc77d esi=0024483a
> edi=0022e963
> ebp=ffc9de1a esp=0000075c program=D:\DJGPP.2\BIN/gcc.exe
> cs: sel=02b7  base=02100000  limit=002cffff
> ds: sel=02bf  base=02100000  limit=002cffff
> es: sel=02bf  base=02100000  limit=002cffff
> fs: sel=028f  base=00015fb0  limit=0000ffff
> gs: sel=0277  base=00000000  limit=0010ffff
> ss: sel=028f  base=00015fb0  limit=0000ffff
> App stack: [000ae5b0..0002e5b0]  Exceptn stack: [0002dff8..0002c0b8]

That's a weirdo one: EBP and ESP are screwed up, and SS is loaded with a 
segment that isn't ours.  To say nothing of EIP, which is in the null 
page.

> I tried symify but there is no debug info in gcc.exe

symify would not help even if gcc was unstripped: the EIP is outside any 
valid code and SS:SP aren't pointing to our stack, so you have no hope of 
getting a traceback.

> How could I help track down the problem ?

I'd suggest to build the same version of GCC with stock v2.03, and see if 
that binary crashes or not.

Is it possible that the way you installed this GCC version somehow mixes 
up files from different GCC distributions?  Or did you completely 
replaced your compiler with this version?